Heights of college women have a distribution that can be approximated by a normal curve with a mean of 65 inches and a standard deviation equal to 3 inches. About what proportion of college women are between 65 and 67 inches tall?
a. 0.75
b. 0.50
c. 0.25
d. 0.17
Question 2
A CBS News poll taken in January 2010 asked a random sample of 1,090 adults in the US Do you think the federal government is adequately prepared to deal with a major earthquake in the United States, or not? A 95 confidence interval for the proportion of the population that thinks the government is prepared is .31 to .37 . Based on this result, which one of the following statements is false?
a. It is reasonable to say that a majority of adults in the US think the federal government is prepared to deal with a major earthquake.
b. It is reasonable to say that fewer than half of adults in the US think the federal government is prepared to deal with a major earthquake.
c. It is possible that approximately 35 of adults in the US think the federal government is prepared to deal with a major earthquake.
d. A 99 confidence interval for the proportion of the population that thinks the government is prepared would be wider than the 95 confidence interval given above.
World map of the distribution of skin color.
Normal artery versus plaque formation
Tonsils—normal and enlarged.
Normal change in sea level
How the Return to Education Affects the Distribution of Income
Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate